[platform] Detect if running under Rosetta translator

platform/platform_darwin.go

@@ -1,14 +1,40 @@
 package platform
 
-import "strings"
+import (
+	"strings"
+
+	log "github.com/cihub/seelog"
+	"golang.org/x/sys/unix"
+)
 
 var unameOptions = []string{"-s", "-n", "-r", "-m", "-p"}
 
+// processIsTranslated detects if the process using gohai is running under the Rosetta 2 translator
+func processIsTranslated() (bool, error) {
+	// https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845
+	ret, err := unix.SysctlUint32("sysctl.proc_translated")
+
+	if err == nil {
+		return ret == 1, nil
+	} else if err.(unix.Errno) == unix.ENOENT {
+		return false, nil
+	}
+	return false, err
+}
+
 func updateArchInfo(archInfo map[string]interface{}, values []string) {
 	archInfo["kernel_name"] = values[0]
 	archInfo["hostname"] = values[1]
 	archInfo["kernel_release"] = values[2]
 	archInfo["machine"] = values[3]
 	archInfo["processor"] = strings.Trim(values[4], "\n")
 	archInfo["os"] = values[0]
+
+	if isTranslated, err := processIsTranslated(); err == nil && isTranslated {
+		log.Debug("Running under Rosetta translator; overriding architecture values")
+		archInfo["processor"] = "arm"
+		archInfo["machine"] = "arm64"
+	} else if err != nil {
+		log.Debugf("Error when detecting Rosetta translator: %s", err)
+	}
 }